In the latest revision of
ATA 103 (ATA Spec 103 Revision 2009), many of the changes directly impact fuel filtration.
Below are some of the major changes and what they mean for those in the fuel handling
Chapter 2. General
2-4 Fuel Storage Facilities
2-5 Fuel Facility Checks
Filter/Separators are required for receiving fuel into and dispensing fuel from
storage which will supply fuel directly into aircraft, refuelers, or hydrant systems.
Existing full-flow monitors at fuel facilities must be replaced within 1-year from the
date of ATA 103 revision 2009.1.
What this means:
Fuel filter monitors with absorbent type elements - both 2 inch and 6 inch monitor
type (EI 1583) are now prohibited from use in fuel storage on either inbound or
outbound filtration. Existing systems are okay until February, 2010.
Chapter 3 Procedures and Tests
4. Monthly checks
4.1 Filtration (Millipore) & Free Water Test
Perform a membrane color/particle (Millipore) simultaneously, under flow, upstream
and downstream of each filter/separator and monitor vessel. Perform a free water test
downstream of each filter/separator and monitor vessel. Record results.
4.2 Corrected Filter Differential Pressure
Under normal flow conditions, check and record observed differential pressure, flow
rate, and corrected differential pressure across each working filter.
What this means:
Velcon Filters, LLC has developed a couple of solutions for calculating corrected
differential pressure. One is the FDPM®, Flow Differential Pressure Module, which has now
been successfully installed in a few locations in the US. The FDPM® advantage is ease of
use and simplicity of operation.
FPDM Flow / Differential Pressure Module
Another solution, also
available on our web site, is a spreadsheet that calculates corrected differential
Differential Pressure Calculation Spreadsheet (.xls 109kb)
Section 3-9, Filter Vessel Differential Pressure
The filter elements must
be replaced when a sudden drop in differential pressure occurs under similar flow
conditions or the filter vessel differential pressure exceeds the following limits:
Coalescer elements - 15 psi. Monitor elements - 15 psi.
What this means:
This is a decrease for monitor elements - previously the changeout was 25 psi.
Velcon has accordingly updated the decals of cartridge changeout curves. Decal #1979 is a
15 psi changeout curve that can now be used for both coalescer cartridges and monitor
cartridges at locations complying with ATA 103. Decal #1846 for 25 psi changeout for
monitor cartridges is still available for locations that do not need to comply with ATA
103. (Decals are provided at no charge.) Along with changes to the decals, Velcon has also
updated the Operating Procedures, PN 09-923, Form 1839, to reflect the new information.
This form is also available on our web site:
Monitor Operations Manual (176kb)
3-13 Filter/Monitor Element Change Procedures
Please note that Velcon no
longer carries the DP Calculators (Form 1871). Instead we recommend customers use the
decals with the appropriate curves. Another option is to use the FDPM® (Flow Differential
Pressure Module), mentioned previously.
Revised to include monitors.
Guidance for circulating product after a filter changeout is changed to per filter
manufacturers recommendations Velcon recommends recirculation for at least 3
Also, on the FILTER
VESSEL INSPECTION/CLEANING RECORD Form, page 91, the following statement is made:
Tighten nuts on tie rods (washer should curl)
that the nuts should be torqued according to the manufacturers recommendations.
103 Notice (.pdf
103 is copyrighted by the Air Transport Association of America and is used here with
ATAs permission. For more information or to purchase the specification, please
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